Flexible conduit.



C. H. MILLER.

FLEXIBLE GONDUIT APPLICATION FILED JULY 25 Patented Dec. 7, 1909.

INVENTOH s E s s E N n w Pt V 'l r ot (ft entail H. TIHLLER, OF WEST 'I application filed July 25.

To whom ii may concern:

lie it known that 1 CHARLES ll. Mniiiicu, a lilZtll at the l llli'ULl .ltatea of West Pitt's burg v in the rounty of llawrem'e, l ennsylvannn have invented a new and \lfitlflllidtfflconduits tor eli-eti'ie wires or eleetriral eondiu'tor.-+ and the objeei of the invention is to provide a simple. atrong and durable inaulating eonduit, \vhieh may be earily bent or flexed, and yet is tilt to it did 'rahle degree.

in the preferred form otf my invention the eonduit is prln ided with an interior lining 2. which is pt'et'erahly formed of oilelot'h. This; oilrloth in ted in a. strip to the t'orming mandrel and there hutt'ed or lapped at the longitudinal seam. It not onl given a smooth inner surt'aee to the eonduit, but alao lorma a waterproof lining. This inner lining may also be formed of a wax or eoinpoait'ionapplied to the mandrel and then eovered with, say, a eloth Such as lllllr lilh and then routed with another layer oi. eo1n; o:--ation. \l'here oileloth or a coinposition lining: in need. i preferably spread. or fiprinl-tle soapstone or a smooth powder or material over it. inner surt'aee to prevent any clinging tendeney. Over this lining of oilrloth or oompositiom whieh forms a smooth raeeway o'l nieferahlv waterproof anateriah a tubular 't'abrie 3 is braided or woven in the ordinary manner, this preterably being of cotton. This material is then saturated with solation which in preterably of a fireproof nature, and over the braided tube .1 then preferably helieally wind a strip of paper 4. uyhieh rovers and surrounds the Waterproof.braiding. The cotton or material for braiding or weaving; the tubular fabric may be treated to tire proof it before it is formed into the tube and the Windinginay be tormed of Wooden or other strips ins ead of paper strips. The tube may then be rovei ed with another Woven or braided tube and the tube is then preferably treated with another layer 0t? Specification. of Letters Itatant.

' which is pre invention relates to a ela s of flexible,"

ZNNSYLVAI Serial N0. 385,5215.

waterprooting compound, and rn y or may not be sprinkled with mica. tildes or other nonanfiannnatile material to ldlltlGiYlt] more hreproo't.

The advantages of my invent Irom the smooth rarewzry and Q, from the, peculiar "f ture of the liniehei'l eonduit.

The oileloth center, it oileloth used, may be, pasted along the overlapping seam or may he simply hutted at the longitudinal seam and adhere to the inner surface of the braiding by raison ot the satin i tiou. The lining may also be split into two layers, the inner of which ma} b a smooth coating of roinposition t; and the next a fabric 7; and in this type the cotton woven covering over the oilelorh can be dispensed with and a. muslin eovering n of fabric eniployed. in this ease the tube would eon :iist (it an inner lining of smooth COUIPOSh Lion ti, then a fabric I the 1 another fabric 5;, then a eoatine' o't' waterproofing solution it, then heli ally wound paper strips i and then a woven or braided tubular tabrie ll. The whole would then be saturated with a waterproofing solution and the mica layer may or may not be sprinkled on as desired.

Other variations run he made in the con duit without.- departing from my invent-i n- 1 claim: 7

1. A ni'm-lnetallio flexible conduit, for elee trio wires, having an inner layer provided with a smooth interior face, and a tubular braided or woven fabric surrounding said inner layer and saturated with at protecting unbalance; substantially as described.

2. A non-metallic flexible conduit for elem trie Wires, having an. inner layer provided on its inner surface with a coating or lining of smooth material, a tubular braided or woven fabric surrounding the inner layer and saturated with a, tlreproofing solution, and a heli -ally wound strip of paper snrrounding and covering the fabric; substan tially as described.

ii. A flexible non-metallic conduit for electric wires, comprisingan inner layer of oil cloth, a tubular braided or woven fabric surrounding the oil elotlna flexible strip wound helirally over said fabric, another woven or braided tubular t alirio surrinind- Mil ing the belicallyu Wound strip, and an outer "rounding the. paper strips and saturated layer of protectingqcompound; substantially with at protecting solution, and an outer as described. covering ofmica flakes; substantially as de- 4. A flexible non-metallic conduit for elecscribed.

5 .tric wires, comprising an inner fabric tube In testimony whereof, I have hereunto set if) having a-smooth interior surface, a second my hand.

fabric tube surroundingZthe first and coated CHARLES H. MILLER. with a waterproofing solution, a helically Witnesses: wound paper strip surrounding the fabric JOHN MiLLER,

w' tube, a woven or braided tubular fabric sur- H. M. Oomvm. 

